Pros

Cons

Ends 32-bit app support, forcing such apps to run in complex workarounds.

Security enhancements may request repeated confirmations to allow some apps to run.

Bottom Line

Catalina, the latest version of macOS, offers beefed-up security, solid performance, the ability to use an iPad as a second screen, and many smaller enhancements. It also ends 32-bit app support, so check your apps before you upgrade.